What is science?

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What is science?

• Science
• is a process by which we gain knowledge
• deals only with the natural world
• collects organizes information
  (data/evidence)
• gives explanations that can be tested
• Science is an organized way of using evidence to
  learn about the natural world.

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Scientific Method

• Science starts with observation.
• (using 5 senses)
• Can your senses be fooled?

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What do you see in this picture?
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What do you see in this picture?
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What do you see in this picture?
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Count the black dots at the intersections of the
boxes?
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How many squares are there?
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How many Fs are there in the following sentence?

• FINISHED FILES ARE THE RESULT OF MANY YEARS OF
  SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF
  SEVERAL YEARS.

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• Aoccdrnig to a rscheearch at CmabrigdeUinervtisy,
  it deosn't mttaer in waht oredr the ltteers in a
  wrod are, the olny iprmoatnt tihng is taht the
  frist and lsat ltteer be in the rghit pclae. The
  rset can be a taotl mses and you can sitll raed
  it wouthit aporbelm.Tihs is bcuseae the huamn
  mnid deos not raed ervey lteter by istlef, but
  the wrod as a wlohe. Amzanig huh? Yaeh and I
  awlyas thought slpeling wasipmorantt!The
  phaonmneal pweor of the hmuan mnid.

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Scientific Method

• 1. Observation
• (collect data/evidence)
• 2. Ask a question
• Why is the sky blue?
• Where do babies come from?
• Where do maggots come from?

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Scientific Method

• 3. Form a Hypothesis
• A hypothesis explains both the
• Observations/evidence and can be
• tested.

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Scientific Method

• 4. Experiment
• An experiment is the process of testing the
  hypothesis.
• Control group
• Experimental group
• Only 1 variable should be tested.
• 5. Analyze Results
• Do the results support your hypothesis?

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Scientific Method

• 6. Draw Conclusions
• Make a complete statement of what is thought to
  be true

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Start
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Tools in Biology
International System of Measurements
(SI) SI Base Units Length meter Mass
gram Volume liter
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Characteristics of Life

• 1. Made of cells
• Cell Basic unit of all life
• Unicellular vs. Multicellular

Diatoms
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Characteristics of Life

• 2. Reproduction
• Asexual -- no exchange of genetic material

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Characteristics of Life

• Sexual -- Genetic material is exchanged

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Characteristics of Life
3. Genetic code
DNA
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Characteristics of Life
4. Grow and develop
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Characteristics of Life

• 5. Obtain use material energy

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Characteristics of Life

• 6. Respond to their environment

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Characteristics of Life

• 7. Maintain an internal balance
• Homeostasis
• H2O Content
• Temperature
• Food Intake

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Characteristics of Life

• 8. Change over time (evolution)

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Branches of Biology
1. Biology -- The study of life 2. Botany --
The study of plants 3. Zoology -- The study of
animals